The new biographical drama On The Basis Of Sexfollows the Supreme Court Justice Ruth Bader Ginsburg’s early career as a lawyer, from teaching at Rutgers Law School to founding the Women’s Rights Project. In the film, Justin Theroux co-stars as Mel Wulf, the legal director of the ACLU and an early colleague of Ginsburg’s. In honor of the film’s wide release, we spoke with Theroux about the film, and the complicated politics of the Supreme Court.